nvim: Unpin base16 plugin

Since the newer versions are working well on my system again, we can
unpint the pinned commit from base16.

nvim/.config/nvim/lua/plugins/core.lua

@@ -41,7 +41,6 @@ return {
 		lazy = false,
 		priority = 1000,
 		dependencies = { "rktjmp/fwatch.nvim" },
-		commit = "96e3089", -- pin it to last commit before regression change
 	},
     -- try to avoid putting files in util buffers, e.g. filetree, aerial, undotree, ..
     {